Tool holder



Aug.-11, 1942. J. M. LUERS v T001. HOLDER Filed Aug: 2o, 1941 PatentedAug. 11, 1942 UNITED STATES PATENT OFFICE TOOL HOLDER John M. Luers,Mount Clemens, Mich.

Application August 20, 1941, Serial No. 407,565

7 Claims.

ventional direction.

Another object of the invention is to provide a toolholder consisting ofa block on either side of which a blade support may be mounted, andwherein means are provided for permitting vertical adjustment of thesupport relative to the block.

A further object of the invention is to provide such a toolholderincluding means on the support for securing the blade on either sidethereof so that it may project the desired distance in front of thesupport and at an upward or downward inclination towards the axis of thework.

Having thus briefly and broadly stated some of the objects andadvantages of the invention, I will now describe it in detail with theaid of the accompanying drawing, in which:

Figure 1 illustrates a side elevation of theinvention with the bladearranged for cutting work rotating in the conventional direction fromthe front of the machine.

Figure 2 is a partial side elevation showing the support and blademounted on the other side of the block for cutting work turning in thenonconventional direction when the block is mounted upon the back of themachine.

Figure 3 is a plan view of Figure 2, and

Figure 4 is a front View thereof.

Figure 5 is a partial side View showing the blade downwardly inclinedtowards its cutting extremity for cutting work rotated in thenonconventional direction when the block is mounted upon the front ofthe machine.

Referring to the drawing, I designates a block which is provided withsuitable means for attachment to a machine, such as a projection 2 toengage a T-slot 3 in a table 4. 5 denotes a bolt which extends throughan opening formed through the block I, and the head 6 of the bolt isdrawn up against the top of the T-slot 3 by a nut I in engagement withthe upper extremity of the said bolt which projects above the block. Onelateral extremity 8, preferably of reduced width,

of the block I has its opposite vertical sides,

which are parallel to one another, serrated vertically, and formedsubstantially centrally through this serrated extremity in a verticallyelongated slot 9.

A tool support I0 has its opposite Vertical sides vertically serrated atII for a portion of its length, and extending through the serratedportion of the support is a tapped hole I2. Formed transversely in theopposite serrated sides of the support Il and extending the full lengthof these sides are recesses generally designated by the numeral I4 whichare throughout their entire Vcross section deeper than the bases of theserrations across which they extend at an inclination thereto. Eachrecess I4 consists of a deeper longitudinal portion I4a. spaced from aparallel shallower portion IlIb` by an intermediate step I4c which isvertically in alignment with a second step Idd which extendslongitudinally along one margin of the said recess. The two recesses I4thus formed in opposite sides of the support III are in alignment withone another. Extending through the support I0 and through the two recesssteps I4d are apertures I5 in each of which a pin IG is mounted forrotation but is held against axial movement by means of a screw I1 whichengages annular grooves I8 formed around both of said pinsintermediately of their length. Formed around both extremities of bothpins I6 are cam faces Ilia. One of the serrated sides II of the supportI0 is held against one serrated extremity 8 of the block I by a screw I9which extends through the vertically elongated slot 9 to permit verticaladjustment of the support I0, and is in threaded engagement with thetapped hole I2 in the latter.

The blade 2l] contemplated for use in this toolholder assembly consistsof a thinner longitudinal shank 2| having a wider cutting head 22 formedalong one longitudinal margin so that the sides of the head projectbeyond the sides of the shank. The cutting head 22 rests in the deeperportion I4a. of the recess on one side of the support and the shank 2|both intermediately of its Width and along its margin remote from thehead 22 bears against the steps Ide and I4d. When the blade is thusmounted in one of the recesses I4 it is frictionally held therein byrotation of the pins IG so that their cam faces I9 force the head 22 ofthe blade against the wall I4e formed along one side of that recess. Itis preferred that the pins I6 be axially apertured to receive a Wrenchcommonly employed for turning safety head set screws, thereby permittingthe provision of means for rotating the pins without necessitating theuse of heads thereon which project outwardly from the support I3.

While only three positions of the blade 20 and support lil relative tothe block l are shown in the drawing it is of course obvious that thesupport may be mounted upon either side of the block, and with thesupport so turned that the blade 20 carried in its outwardly disposedrecess I4 projects either upwardly or downwardly towards the work asrequired.

It will also be noted that at the extremity of the support IE) fromwhich the cutting edge 23 of the blade 20 projects that the support iscurved at 24 to provide clearance for the work (not shown), and a heel25 is formed at the outer termination of this curved portion to providesupport for the blade and minimize the blade overhang.

While in the foregoing the preferred embodiment of the invention hasbeen described and shown, it is understood that alterations and`extremity having an aperture formed therethrough extending through theserrated side` a support having at least one vertical side serrated tocoact with the aforesaid serrations, said support having an apertureformed through its serrated side, one of said apertures being largerthan the other and the smaller aperture being threaded, fastening meansextending through the larger aperture in engagement with the smallerthreaded aperture for securing the support against said block andpermitting adjustment of the support thereon when the serrated faces arein coaction, a blade, and means on the support for securing the bladethereon.

'72. A toolholder comprising the combinatie-n set forth in claim 1,wherein the serrated side of the support is provided with a transverserecess to receive the bladea nd rotary cam means mounted in the supportfor holding the blade immovable in said recess.

3. A toolholder comprising a block, one lateral extremity of said blockhaving substantially vertical serrations formed on opposite sides, saidlateral extremity being apertured,V said aperture connecting theserrated sides, a support having its opposite substantially verticalsides vertically serrated, either serrated side being adapted to coactwith either serrated extremity of the block, said support having anaperture therethrough extending between its serrated sides, one 0f saidopertures being larger than the other and the smaller one beingthreaded, a fastening means projecting through the larger aperture inengagement with the smaller threaded aperture for securing the supportto said block and permitting adjustment of the support thereon when oneof its serrated sides is in coaction with one serrated side of saidlateral extremity, each serrated side of the support having a transverserecess for-med therein, a blade supported in the recess in the side ofthe support remote from the block, and means for holding said bladeimmovable in its recess.

4. A toolholder comprising the combination set forth in claim 3, whereinthe two transverse recesses are in alignment and at an inclination tothe support serrations whereby by turning the support upside down theblade is positioned to cutting work rotating in the opposite direction.

5. A toolholder comprising the combination set forth in claim 3,'wherein the means for holding the blade in either recess includesrotatable pins mounted in the support, cams formed on both .extremitiesof said pins whereby rotation of the pins causes engagement of the bladewhen mounted in either recess, and means for holding the pins againstaxial movement.

6. A toolholder comprising the combination set forth in claim 3, whereinthe blades includes a wider head extending longitudinally along and onboth sides of a narrower shank, and the recesses include longitudinalsteps against which the shank rests, the blade holding means forcing theblade head into frictional engagement with one side of the recess inwhich it is mounted.

'7. A toolholder comprising a block having means for attachment to amachine one extremity of said block having serrations on at least oneside, a support having at least one side serrated to coact with theblock serrations, fastening means for securing the support to the block,said block and support having apertures formed therein for the fasteningmeans, said apertures being formed to permit sliding movement of thesupport upon the block when the two sets of serrations are in coactionand said fastening means loosened, a blade, and means on the support forsecuring the blade thereon.

JOHN M. LUERS,

